content/app/content_main_runner.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "content/public/app/content_main_runner.h"
   6
   7 #include <stdlib.h>
   8
   9 #include "base/allocator/allocator_extension.h"
  10 #include "base/at_exit.h"
  11 #include "base/command_line.h"
  12 #include "base/debug/debugger.h"
  13 #include "base/files/file_path.h"
  14 #include "base/i18n/icu_util.h"
  15 #include "base/lazy_instance.h"
  16 #include "base/logging.h"
  17 #include "base/memory/scoped_ptr.h"
  18 #include "base/memory/scoped_vector.h"
  19 #include "base/metrics/statistics_recorder.h"
  20 #include "base/path_service.h"
  21 #include "base/process/launch.h"
  22 #include "base/process/memory.h"
  23 #include "base/process/process_handle.h"
  24 #include "base/profiler/alternate_timer.h"
  25 #include "base/profiler/scoped_tracker.h"
  26 #include "base/strings/string_number_conversions.h"
  27 #include "base/strings/string_util.h"
  28 #include "base/strings/stringprintf.h"
  29 #include "base/trace_event/trace_event.h"
  30 #include "content/browser/browser_main.h"
  31 #include "content/common/set_process_title.h"
  32 #include "content/common/url_schemes.h"
  33 #include "content/gpu/in_process_gpu_thread.h"
  34 #include "content/public/app/content_main.h"
  35 #include "content/public/app/content_main_delegate.h"
  36 #include "content/public/app/startup_helper_win.h"
  37 #include "content/public/browser/content_browser_client.h"
  38 #include "content/public/common/content_client.h"
  39 #include "content/public/common/content_constants.h"
  40 #include "content/public/common/content_paths.h"
  41 #include "content/public/common/content_switches.h"
  42 #include "content/public/common/main_function_params.h"
  43 #include "content/public/common/sandbox_init.h"
  44 #include "content/renderer/in_process_renderer_thread.h"
  45 #include "content/utility/in_process_utility_thread.h"
  46 #include "crypto/nss_util.h"
  47 #include "ipc/ipc_descriptors.h"
  48 #include "ipc/ipc_switches.h"
  49 #include "media/base/media.h"
  50 #include "sandbox/win/src/sandbox_types.h"
  51 #include "ui/base/ui_base_paths.h"
  52 #include "ui/base/ui_base_switches.h"
  53
  54 #ifdef V8_USE_EXTERNAL_STARTUP_DATA
  55 #include "gin/v8_initializer.h"
  56 #endif
  57
  58 #if defined(USE_TCMALLOC)
  59 #include "third_party/tcmalloc/chromium/src/gperftools/malloc_extension.h"
  60 #if defined(TYPE_PROFILING)
  61 #include "base/allocator/type_profiler.h"
  62 #include "base/allocator/type_profiler_tcmalloc.h"
  63 #endif
  64 #endif
  65
  66 #if !defined(OS_IOS)
  67 #include "content/app/mojo/mojo_init.h"
  68 #include "content/browser/gpu/gpu_process_host.h"
  69 #include "content/browser/renderer_host/render_process_host_impl.h"
  70 #include "content/browser/utility_process_host_impl.h"
  71 #include "content/public/plugin/content_plugin_client.h"
  72 #include "content/public/renderer/content_renderer_client.h"
  73 #include "content/public/utility/content_utility_client.h"
  74 #endif
  75
  76 #if defined(OS_WIN)
  77 #include <malloc.h>
  78 #include <cstring>
  79
  80 #include "base/strings/string_number_conversions.h"
  81 #include "base/trace_event/trace_event_etw_export_win.h"
  82 #include "ui/base/win/atl_module.h"
  83 #include "ui/gfx/win/dpi.h"
  84 #elif defined(OS_MACOSX)
  85 #include "base/mac/scoped_nsautorelease_pool.h"
  86 #if !defined(OS_IOS)
  87 #include "base/power_monitor/power_monitor_device_source.h"
  88 #include "content/app/mac/mac_init.h"
  89 #include "content/browser/browser_io_surface_manager_mac.h"
  90 #include "content/browser/mach_broker_mac.h"
  91 #include "content/child/child_io_surface_manager_mac.h"
  92 #include "content/common/sandbox_init_mac.h"
  93 #endif  // !OS_IOS
  94 #endif  // OS_WIN
  95
  96 #if defined(OS_POSIX)
  97 #include <signal.h>
  98
  99 #include "base/posix/global_descriptors.h"
 100 #include "content/public/common/content_descriptors.h"
 101
 102 #if !defined(OS_MACOSX)
 103 #include "content/public/common/content_descriptors.h"
 104 #include "content/public/common/zygote_fork_delegate_linux.h"
 105 #endif
 106 #if !defined(OS_MACOSX) && !defined(OS_ANDROID)
 107 #include "content/zygote/zygote_main.h"
 108 #endif
 109
 110 #endif  // OS_POSIX
 111
 112 #if !defined(OS_MACOSX) && defined(USE_TCMALLOC)
 113 extern "C" {
 114 int tc_set_new_mode(int mode);
 115 }
 116 #endif
 117
 118 namespace content {
 119 extern int GpuMain(const content::MainFunctionParams&);
 120 #if defined(ENABLE_PLUGINS)
 121 #if !defined(OS_LINUX)
 122 extern int PluginMain(const content::MainFunctionParams&);
 123 #endif
 124 extern int PpapiPluginMain(const MainFunctionParams&);
 125 extern int PpapiBrokerMain(const MainFunctionParams&);
 126 #endif
 127 extern int RendererMain(const content::MainFunctionParams&);
 128 extern int UtilityMain(const MainFunctionParams&);
 129 }  // namespace content
 130
 131 namespace content {
 132
 133 #if !defined(CHROME_MULTIPLE_DLL_CHILD)
 134 base::LazyInstance<ContentBrowserClient>
 135     g_empty_content_browser_client = LAZY_INSTANCE_INITIALIZER;
 136 #endif  //  !CHROME_MULTIPLE_DLL_CHILD
 137
 138 #if !defined(OS_IOS) && !defined(CHROME_MULTIPLE_DLL_BROWSER)
 139 base::LazyInstance<ContentPluginClient>
 140     g_empty_content_plugin_client = LAZY_INSTANCE_INITIALIZER;
 141 base::LazyInstance<ContentRendererClient>
 142     g_empty_content_renderer_client = LAZY_INSTANCE_INITIALIZER;
 143 base::LazyInstance<ContentUtilityClient>
 144     g_empty_content_utility_client = LAZY_INSTANCE_INITIALIZER;
 145 #endif  // !OS_IOS && !CHROME_MULTIPLE_DLL_BROWSER
 146
 147 #if defined(OS_WIN)
 148
 149 #endif  // defined(OS_WIN)
 150
 151 #if defined(OS_POSIX) && !defined(OS_IOS)
 152
 153 // Setup signal-handling state: resanitize most signals, ignore SIGPIPE.
 154 void SetupSignalHandlers() {
 155   // Sanitise our signal handling state. Signals that were ignored by our
 156   // parent will also be ignored by us. We also inherit our parent's sigmask.
 157   sigset_t empty_signal_set;
 158   CHECK(0 == sigemptyset(&empty_signal_set));
 159   CHECK(0 == sigprocmask(SIG_SETMASK, &empty_signal_set, NULL));
 160
 161   struct sigaction sigact;
 162   memset(&sigact, 0, sizeof(sigact));
 163   sigact.sa_handler = SIG_DFL;
 164   static const int signals_to_reset[] =
 165       {SIGHUP, SIGINT, SIGQUIT, SIGILL, SIGABRT, SIGFPE, SIGSEGV,
 166        SIGALRM, SIGTERM, SIGCHLD, SIGBUS, SIGTRAP};  // SIGPIPE is set below.
 167   for (unsigned i = 0; i < arraysize(signals_to_reset); i++) {
 168     CHECK(0 == sigaction(signals_to_reset[i], &sigact, NULL));
 169   }
 170
 171   // Always ignore SIGPIPE.  We check the return value of write().
 172   CHECK(signal(SIGPIPE, SIG_IGN) != SIG_ERR);
 173 }
 174
 175 #endif  // OS_POSIX && !OS_IOS
 176
 177 void CommonSubprocessInit(const std::string& process_type) {
 178 #if defined(OS_WIN)
 179   // HACK: Let Windows know that we have started.  This is needed to suppress
 180   // the IDC_APPSTARTING cursor from being displayed for a prolonged period
 181   // while a subprocess is starting.
 182   PostThreadMessage(GetCurrentThreadId(), WM_NULL, 0, 0);
 183   MSG msg;
 184   PeekMessage(&msg, NULL, 0, 0, PM_REMOVE);
 185 #endif
 186 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 187   // Various things break when you're using a locale where the decimal
 188   // separator isn't a period.  See e.g. bugs 22782 and 39964.  For
 189   // all processes except the browser process (where we call system
 190   // APIs that may rely on the correct locale for formatting numbers
 191   // when presenting them to the user), reset the locale for numeric
 192   // formatting.
 193   // Note that this is not correct for plugin processes -- they can
 194   // surface UI -- but it's likely they get this wrong too so why not.
 195   setlocale(LC_NUMERIC, "C");
 196 #endif
 197 }
 198
 199 // Only needed on Windows for creating stats tables.
 200 #if defined(OS_WIN)
 201 static base::ProcessId GetBrowserPid(const base::CommandLine& command_line) {
 202   base::ProcessId browser_pid = base::GetCurrentProcId();
 203   if (command_line.HasSwitch(switches::kProcessChannelID)) {
 204     std::string channel_name =
 205         command_line.GetSwitchValueASCII(switches::kProcessChannelID);
 206
 207     int browser_pid_int;
 208     base::StringToInt(channel_name, &browser_pid_int);
 209     browser_pid = static_cast<base::ProcessId>(browser_pid_int);
 210     DCHECK_NE(browser_pid_int, 0);
 211   }
 212   return browser_pid;
 213 }
 214 #endif
 215
 216 class ContentClientInitializer {
 217  public:
 218   static void Set(const std::string& process_type,
 219                   ContentMainDelegate* delegate) {
 220     ContentClient* content_client = GetContentClient();
 221 #if !defined(CHROME_MULTIPLE_DLL_CHILD)
 222     if (process_type.empty()) {
 223       if (delegate)
 224         content_client->browser_ = delegate->CreateContentBrowserClient();
 225       if (!content_client->browser_)
 226         content_client->browser_ = &g_empty_content_browser_client.Get();
 227     }
 228 #endif  // !CHROME_MULTIPLE_DLL_CHILD
 229
 230 #if !defined(OS_IOS) && !defined(CHROME_MULTIPLE_DLL_BROWSER)
 231     if (process_type == switches::kPluginProcess ||
 232         process_type == switches::kPpapiPluginProcess) {
 233       if (delegate)
 234         content_client->plugin_ = delegate->CreateContentPluginClient();
 235       if (!content_client->plugin_)
 236         content_client->plugin_ = &g_empty_content_plugin_client.Get();
 237       // Single process not supported in split dll mode.
 238     } else if (process_type == switches::kRendererProcess ||
 239                base::CommandLine::ForCurrentProcess()->HasSwitch(
 240                    switches::kSingleProcess)) {
 241       if (delegate)
 242         content_client->renderer_ = delegate->CreateContentRendererClient();
 243       if (!content_client->renderer_)
 244         content_client->renderer_ = &g_empty_content_renderer_client.Get();
 245     }
 246
 247     if (process_type == switches::kUtilityProcess ||
 248         base::CommandLine::ForCurrentProcess()->HasSwitch(
 249             switches::kSingleProcess)) {
 250       if (delegate)
 251         content_client->utility_ = delegate->CreateContentUtilityClient();
 252       // TODO(scottmg): http://crbug.com/237249 Should be in _child.
 253       if (!content_client->utility_)
 254         content_client->utility_ = &g_empty_content_utility_client.Get();
 255     }
 256 #endif  // !OS_IOS && !CHROME_MULTIPLE_DLL_BROWSER
 257   }
 258 };
 259
 260 // We dispatch to a process-type-specific FooMain() based on a command-line
 261 // flag.  This struct is used to build a table of (flag, main function) pairs.
 262 struct MainFunction {
 263   const char* name;
 264   int (*function)(const MainFunctionParams&);
 265 };
 266
 267 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 268 // On platforms that use the zygote, we have a special subset of
 269 // subprocesses that are launched via the zygote.  This function
 270 // fills in some process-launching bits around ZygoteMain().
 271 // Returns the exit code of the subprocess.
 272 int RunZygote(const MainFunctionParams& main_function_params,
 273               ContentMainDelegate* delegate) {
 274   static const MainFunction kMainFunctions[] = {
 275     { switches::kRendererProcess,    RendererMain },
 276 #if defined(ENABLE_PLUGINS)
 277     { switches::kPpapiPluginProcess, PpapiPluginMain },
 278 #endif
 279     { switches::kUtilityProcess,     UtilityMain },
 280   };
 281
 282   ScopedVector<ZygoteForkDelegate> zygote_fork_delegates;
 283   if (delegate) {
 284     delegate->ZygoteStarting(&zygote_fork_delegates);
 285     media::InitializeMediaLibrary();
 286   }
 287
 288   // This function call can return multiple times, once per fork().
 289   if (!ZygoteMain(main_function_params, zygote_fork_delegates.Pass()))
 290     return 1;
 291
 292   if (delegate) delegate->ZygoteForked();
 293
 294   // Zygote::HandleForkRequest may have reallocated the command
 295   // line so update it here with the new version.
 296   const base::CommandLine& command_line =
 297       *base::CommandLine::ForCurrentProcess();
 298   std::string process_type =
 299       command_line.GetSwitchValueASCII(switches::kProcessType);
 300   ContentClientInitializer::Set(process_type, delegate);
 301
 302   MainFunctionParams main_params(command_line);
 303   main_params.zygote_child = true;
 304
 305   for (size_t i = 0; i < arraysize(kMainFunctions); ++i) {
 306     if (process_type == kMainFunctions[i].name)
 307       return kMainFunctions[i].function(main_params);
 308   }
 309
 310   if (delegate)
 311     return delegate->RunProcess(process_type, main_params);
 312
 313   NOTREACHED() << "Unknown zygote process type: " << process_type;
 314   return 1;
 315 }
 316 #endif  // defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 317
 318 #if !defined(OS_IOS)
 319 static void RegisterMainThreadFactories() {
 320 #if !defined(CHROME_MULTIPLE_DLL_BROWSER) && !defined(CHROME_MULTIPLE_DLL_CHILD)
 321   UtilityProcessHostImpl::RegisterUtilityMainThreadFactory(
 322       CreateInProcessUtilityThread);
 323   RenderProcessHostImpl::RegisterRendererMainThreadFactory(
 324       CreateInProcessRendererThread);
 325   GpuProcessHost::RegisterGpuMainThreadFactory(
 326       CreateInProcessGpuThread);
 327 #else
 328   base::CommandLine& command_line = *base::CommandLine::ForCurrentProcess();
 329   if (command_line.HasSwitch(switches::kSingleProcess)) {
 330     LOG(FATAL) <<
 331         "--single-process is not supported in chrome multiple dll browser.";
 332   }
 333   if (command_line.HasSwitch(switches::kInProcessGPU)) {
 334     LOG(FATAL) <<
 335         "--in-process-gpu is not supported in chrome multiple dll browser.";
 336   }
 337 #endif  // !CHROME_MULTIPLE_DLL_BROWSER && !CHROME_MULTIPLE_DLL_CHILD
 338 }
 339
 340 // Run the FooMain() for a given process type.
 341 // If |process_type| is empty, runs BrowserMain().
 342 // Returns the exit code for this process.
 343 int RunNamedProcessTypeMain(
 344     const std::string& process_type,
 345     const MainFunctionParams& main_function_params,
 346     ContentMainDelegate* delegate) {
 347   static const MainFunction kMainFunctions[] = {
 348 #if !defined(CHROME_MULTIPLE_DLL_CHILD)
 349     { "",                            BrowserMain },
 350 #endif
 351 #if !defined(CHROME_MULTIPLE_DLL_BROWSER)
 352 #if defined(ENABLE_PLUGINS)
 353 #if !defined(OS_LINUX)
 354     { switches::kPluginProcess,      PluginMain },
 355 #endif
 356     { switches::kPpapiPluginProcess, PpapiPluginMain },
 357     { switches::kPpapiBrokerProcess, PpapiBrokerMain },
 358 #endif  // ENABLE_PLUGINS
 359     { switches::kUtilityProcess,     UtilityMain },
 360     { switches::kRendererProcess,    RendererMain },
 361     { switches::kGpuProcess,         GpuMain },
 362 #endif  // !CHROME_MULTIPLE_DLL_BROWSER
 363   };
 364
 365   RegisterMainThreadFactories();
 366
 367   for (size_t i = 0; i < arraysize(kMainFunctions); ++i) {
 368     if (process_type == kMainFunctions[i].name) {
 369       if (delegate) {
 370         int exit_code = delegate->RunProcess(process_type,
 371             main_function_params);
 372 #if defined(OS_ANDROID)
 373         // In Android's browser process, the negative exit code doesn't mean the
 374         // default behavior should be used as the UI message loop is managed by
 375         // the Java and the browser process's default behavior is always
 376         // overridden.
 377         if (process_type.empty())
 378           return exit_code;
 379 #endif
 380         if (exit_code >= 0)
 381           return exit_code;
 382       }
 383       return kMainFunctions[i].function(main_function_params);
 384     }
 385   }
 386
 387 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 388   // Zygote startup is special -- see RunZygote comments above
 389   // for why we don't use ZygoteMain directly.
 390   if (process_type == switches::kZygoteProcess)
 391     return RunZygote(main_function_params, delegate);
 392 #endif
 393
 394   // If it's a process we don't know about, the embedder should know.
 395   if (delegate)
 396     return delegate->RunProcess(process_type, main_function_params);
 397
 398   NOTREACHED() << "Unknown process type: " << process_type;
 399   return 1;
 400 }
 401 #endif  // !OS_IOS
 402
 403 class ContentMainRunnerImpl : public ContentMainRunner {
 404  public:
 405   ContentMainRunnerImpl()
 406       : is_initialized_(false),
 407         is_shutdown_(false),
 408         completed_basic_startup_(false),
 409         delegate_(NULL),
 410         ui_task_(NULL) {
 411 #if defined(OS_WIN)
 412     memset(&sandbox_info_, 0, sizeof(sandbox_info_));
 413 #endif
 414   }
 415
 416   ~ContentMainRunnerImpl() override {
 417     if (is_initialized_ && !is_shutdown_)
 418       Shutdown();
 419   }
 420
 421 #if defined(USE_TCMALLOC)
 422   static bool GetAllocatorWasteSizeThunk(size_t* size) {
 423     size_t heap_size, allocated_bytes, unmapped_bytes;
 424     MallocExtension* ext = MallocExtension::instance();
 425     if (ext->GetNumericProperty("generic.heap_size", &heap_size) &&
 426         ext->GetNumericProperty("generic.current_allocated_bytes",
 427                                 &allocated_bytes) &&
 428         ext->GetNumericProperty("tcmalloc.pageheap_unmapped_bytes",
 429                                 &unmapped_bytes)) {
 430       *size = heap_size - allocated_bytes - unmapped_bytes;
 431       return true;
 432     }
 433     DCHECK(false);
 434     return false;
 435   }
 436
 437   static void GetStatsThunk(char* buffer, int buffer_length) {
 438     MallocExtension::instance()->GetStats(buffer, buffer_length);
 439   }
 440
 441   static void ReleaseFreeMemoryThunk() {
 442     MallocExtension::instance()->ReleaseFreeMemory();
 443   }
 444 #endif
 445
 446   int Initialize(const ContentMainParams& params) override {
 447     ui_task_ = params.ui_task;
 448
 449     base::EnableTerminationOnOutOfMemory();
 450 #if defined(OS_WIN)
 451     RegisterInvalidParamHandler();
 452     ui::win::CreateATLModuleIfNeeded();
 453
 454     sandbox_info_ = *params.sandbox_info;
 455 #else  // !OS_WIN
 456
 457 #if defined(OS_ANDROID)
 458     // See note at the initialization of ExitManager, below; basically,
 459     // only Android builds have the ctor/dtor handlers set up to use
 460     // TRACE_EVENT right away.
 461     TRACE_EVENT0("startup", "ContentMainRunnerImpl::Initialize");
 462 #endif  // OS_ANDROID
 463
 464     // NOTE(willchan): One might ask why these TCMalloc-related calls are done
 465     // here rather than in process_util_linux.cc with the definition of
 466     // EnableTerminationOnOutOfMemory().  That's because base shouldn't have a
 467     // dependency on TCMalloc.  Really, we ought to have our allocator shim code
 468     // implement this EnableTerminationOnOutOfMemory() function.  Whateverz.
 469     // This works for now.
 470 #if !defined(OS_MACOSX) && defined(USE_TCMALLOC)
 471
 472 #if defined(TYPE_PROFILING)
 473     base::type_profiler::InterceptFunctions::SetFunctions(
 474         base::type_profiler::NewInterceptForTCMalloc,
 475         base::type_profiler::DeleteInterceptForTCMalloc);
 476 #endif
 477
 478     // For tcmalloc, we need to tell it to behave like new.
 479     tc_set_new_mode(1);
 480
 481     // On windows, we've already set these thunks up in _heap_init()
 482     base::allocator::SetGetAllocatorWasteSizeFunction(
 483         GetAllocatorWasteSizeThunk);
 484     base::allocator::SetGetStatsFunction(GetStatsThunk);
 485     base::allocator::SetReleaseFreeMemoryFunction(ReleaseFreeMemoryThunk);
 486
 487     // Provide optional hook for monitoring allocation quantities on a
 488     // per-thread basis.  Only set the hook if the environment indicates this
 489     // needs to be enabled.
 490     const char* profiling = getenv(tracked_objects::kAlternateProfilerTime);
 491     if (profiling &&
 492         (atoi(profiling) == tracked_objects::TIME_SOURCE_TYPE_TCMALLOC)) {
 493       tracked_objects::SetAlternateTimeSource(
 494           MallocExtension::GetBytesAllocatedOnCurrentThread,
 495           tracked_objects::TIME_SOURCE_TYPE_TCMALLOC);
 496     }
 497 #endif  // !OS_MACOSX && USE_TCMALLOC
 498
 499 #if !defined(OS_IOS)
 500     base::GlobalDescriptors* g_fds = base::GlobalDescriptors::GetInstance();
 501 #endif
 502
 503     // On Android,
 504     // - setlocale() is not supported.
 505     // - We do not override the signal handlers so that we can get
 506     //   stack trace when crashing.
 507     // - The ipc_fd is passed through the Java service.
 508     // Thus, these are all disabled.
 509 #if !defined(OS_ANDROID) && !defined(OS_IOS)
 510     // Set C library locale to make sure CommandLine can parse argument values
 511     // in correct encoding.
 512     setlocale(LC_ALL, "");
 513
 514     SetupSignalHandlers();
 515     g_fds->Set(kPrimaryIPCChannel,
 516                kPrimaryIPCChannel + base::GlobalDescriptors::kBaseDescriptor);
 517 #endif  // !OS_ANDROID && !OS_IOS
 518
 519 #if defined(OS_LINUX) || defined(OS_OPENBSD)
 520     g_fds->Set(kCrashDumpSignal,
 521                kCrashDumpSignal + base::GlobalDescriptors::kBaseDescriptor);
 522 #endif  // OS_LINUX || OS_OPENBSD
 523
 524
 525 #endif  // !OS_WIN
 526
 527     is_initialized_ = true;
 528     delegate_ = params.delegate;
 529
 530     // The exit manager is in charge of calling the dtors of singleton objects.
 531     // On Android, AtExitManager is set up when library is loaded.
 532     // On iOS, it's set up in main(), which can't call directly through to here.
 533     // A consequence of this is that you can't use the ctor/dtor-based
 534     // TRACE_EVENT methods on Linux or iOS builds till after we set this up.
 535 #if !defined(OS_ANDROID) && !defined(OS_IOS)
 536     if (!ui_task_) {
 537       // When running browser tests, don't create a second AtExitManager as that
 538       // interfers with shutdown when objects created before ContentMain is
 539       // called are destructed when it returns.
 540       exit_manager_.reset(new base::AtExitManager);
 541     }
 542 #endif  // !OS_ANDROID && !OS_IOS
 543
 544     // Don't create this loop on iOS, since the outer loop is already handled
 545     // and a loop that's destroyed in shutdown interleaves badly with the event
 546     // loop pool on iOS.
 547 #if defined(OS_MACOSX) && !defined(OS_IOS)
 548     // We need this pool for all the objects created before we get to the
 549     // event loop, but we don't want to leave them hanging around until the
 550     // app quits. Each "main" needs to flush this pool right before it goes into
 551     // its main event loop to get rid of the cruft.
 552     autorelease_pool_.reset(new base::mac::ScopedNSAutoreleasePool());
 553     InitializeMac();
 554 #endif
 555
 556     // On Android, the command line is initialized when library is loaded and
 557     // we have already started our TRACE_EVENT0.
 558 #if !defined(OS_ANDROID)
 559     // argc/argv are ignored on Windows and Android; see command_line.h for
 560     // details.
 561     int argc = 0;
 562     const char** argv = NULL;
 563
 564 #if !defined(OS_WIN)
 565     argc = params.argc;
 566     argv = params.argv;
 567 #endif
 568
 569     base::CommandLine::Init(argc, argv);
 570
 571     base::EnableTerminationOnHeapCorruption();
 572
 573     // TODO(yiyaoliu, vadimt): Remove this once crbug.com/453640 is fixed.
 574     // Enable profiler recording right after command line is initialized so that
 575     // browser startup can be instrumented.
 576     if (delegate_ && delegate_->ShouldEnableProfilerRecording())
 577       tracked_objects::ScopedTracker::Enable();
 578
 579 #if !defined(OS_IOS)
 580     SetProcessTitleFromCommandLine(argv);
 581 #endif
 582 #endif // !OS_ANDROID
 583
 584     int exit_code = 0;
 585     if (delegate_ && delegate_->BasicStartupComplete(&exit_code))
 586       return exit_code;
 587
 588     completed_basic_startup_ = true;
 589
 590     const base::CommandLine& command_line =
 591         *base::CommandLine::ForCurrentProcess();
 592     std::string process_type =
 593         command_line.GetSwitchValueASCII(switches::kProcessType);
 594
 595 #if !defined(OS_IOS)
 596     // Initialize mojo here so that services can be registered.
 597     InitializeMojo();
 598 #endif
 599
 600 #if defined(OS_WIN)
 601     bool init_device_scale_factor = true;
 602     if (command_line.HasSwitch(switches::kDeviceScaleFactor)) {
 603       std::string scale_factor_string = command_line.GetSwitchValueASCII(
 604           switches::kDeviceScaleFactor);
 605       double scale_factor = 0;
 606       if (base::StringToDouble(scale_factor_string, &scale_factor)) {
 607         init_device_scale_factor = false;
 608         gfx::InitDeviceScaleFactor(scale_factor);
 609       }
 610     }
 611     if (init_device_scale_factor)
 612       gfx::InitDeviceScaleFactor(gfx::GetDPIScale());
 613 #endif
 614
 615     if (!GetContentClient())
 616       SetContentClient(&empty_content_client_);
 617     ContentClientInitializer::Set(process_type, delegate_);
 618
 619 #if defined(OS_WIN)
 620     // Route stdio to parent console (if any) or create one.
 621     if (command_line.HasSwitch(switches::kEnableLogging))
 622       base::RouteStdioToConsole();
 623 #endif
 624
 625     // Enable startup tracing asap to avoid early TRACE_EVENT calls being
 626     // ignored.
 627     if (command_line.HasSwitch(switches::kTraceStartup)) {
 628       base::trace_event::TraceConfig trace_config(
 629           command_line.GetSwitchValueASCII(switches::kTraceStartup),
 630           base::trace_event::RECORD_UNTIL_FULL);
 631       base::trace_event::TraceLog::GetInstance()->SetEnabled(
 632           trace_config,
 633           base::trace_event::TraceLog::RECORDING_MODE);
 634     }
 635 #if defined(OS_WIN)
 636     // Enable exporting of events to ETW if requested on the command line.
 637     if (command_line.HasSwitch(switches::kTraceExportEventsToETW))
 638       base::trace_event::TraceEventETWExport::EnableETWExport();
 639 #endif  // OS_WIN
 640
 641 #if !defined(OS_ANDROID)
 642     // Android tracing started at the beginning of the method.
 643     // Other OSes have to wait till we get here in order for all the memory
 644     // management setup to be completed.
 645     TRACE_EVENT0("startup", "ContentMainRunnerImpl::Initialize");
 646 #endif // !OS_ANDROID
 647
 648 #if defined(OS_MACOSX) && !defined(OS_IOS)
 649     // We need to allocate the IO Ports before the Sandbox is initialized or
 650     // the first instance of PowerMonitor is created.
 651     // It's important not to allocate the ports for processes which don't
 652     // register with the power monitor - see crbug.com/88867.
 653     if (process_type.empty() ||
 654         (delegate_ &&
 655          delegate_->ProcessRegistersWithSystemProcess(process_type))) {
 656       base::PowerMonitorDeviceSource::AllocateSystemIOPorts();
 657     }
 658
 659     if (!process_type.empty() &&
 660         (!delegate_ || delegate_->ShouldSendMachPort(process_type))) {
 661       MachBroker::ChildSendTaskPortToParent();
 662     }
 663
 664     if (!command_line.HasSwitch(switches::kSingleProcess) &&
 665         !process_type.empty() && (process_type == switches::kRendererProcess ||
 666                                   process_type == switches::kGpuProcess)) {
 667       base::mac::ScopedMachSendRight service_port =
 668           BrowserIOSurfaceManager::LookupServicePort(getppid());
 669       if (service_port.is_valid()) {
 670         ChildIOSurfaceManager::GetInstance()->set_service_port(
 671             service_port.release());
 672         IOSurfaceManager::SetInstance(ChildIOSurfaceManager::GetInstance());
 673       }
 674     }
 675 #elif defined(OS_WIN)
 676     SetupCRT(command_line);
 677 #endif
 678
 679 #if defined(OS_POSIX)
 680     if (!process_type.empty()) {
 681       // When you hit Ctrl-C in a terminal running the browser
 682       // process, a SIGINT is delivered to the entire process group.
 683       // When debugging the browser process via gdb, gdb catches the
 684       // SIGINT for the browser process (and dumps you back to the gdb
 685       // console) but doesn't for the child processes, killing them.
 686       // The fix is to have child processes ignore SIGINT; they'll die
 687       // on their own when the browser process goes away.
 688       //
 689       // Note that we *can't* rely on BeingDebugged to catch this case because
 690       // we are the child process, which is not being debugged.
 691       // TODO(evanm): move this to some shared subprocess-init function.
 692       if (!base::debug::BeingDebugged())
 693         signal(SIGINT, SIG_IGN);
 694     }
 695 #endif
 696
 697 #if defined(USE_NSS_CERTS)
 698     crypto::EarlySetupForNSSInit();
 699 #endif
 700
 701     ui::RegisterPathProvider();
 702     RegisterPathProvider();
 703     RegisterContentSchemes(true);
 704
 705 #if defined(OS_ANDROID)
 706     int icudata_fd = g_fds->MaybeGet(kAndroidICUDataDescriptor);
 707     if (icudata_fd != -1) {
 708       auto icudata_region = g_fds->GetRegion(kAndroidICUDataDescriptor);
 709       CHECK(base::i18n::InitializeICUWithFileDescriptor(icudata_fd,
 710                                                         icudata_region));
 711     } else {
 712       CHECK(base::i18n::InitializeICU());
 713     }
 714 #else
 715     CHECK(base::i18n::InitializeICU());
 716 #endif  // OS_ANDROID
 717
 718     base::StatisticsRecorder::Initialize();
 719
 720 #if defined(V8_USE_EXTERNAL_STARTUP_DATA)
 721 #if defined(OS_POSIX) && !defined(OS_MACOSX)
 722 #if !defined(OS_ANDROID)
 723     // kV8NativesDataDescriptor and kV8SnapshotDataDescriptor could be shared
 724     // with child processes via file descriptors. On Android they are set in
 725     // ChildProcessService::InternalInitChildProcess, otherwise set them here.
 726     if (command_line.HasSwitch(switches::kV8NativesPassedByFD)) {
 727       g_fds->Set(
 728           kV8NativesDataDescriptor,
 729           kV8NativesDataDescriptor + base::GlobalDescriptors::kBaseDescriptor);
 730     }
 731     if (command_line.HasSwitch(switches::kV8SnapshotPassedByFD)) {
 732       g_fds->Set(
 733           kV8SnapshotDataDescriptor,
 734           kV8SnapshotDataDescriptor + base::GlobalDescriptors::kBaseDescriptor);
 735     }
 736 #endif  // !OS_ANDROID
 737     int v8_natives_fd = g_fds->MaybeGet(kV8NativesDataDescriptor);
 738     int v8_snapshot_fd = g_fds->MaybeGet(kV8SnapshotDataDescriptor);
 739     if (v8_snapshot_fd != -1) {
 740       auto v8_snapshot_region = g_fds->GetRegion(kV8SnapshotDataDescriptor);
 741       gin::V8Initializer::LoadV8SnapshotFromFD(
 742           v8_snapshot_fd, v8_snapshot_region.offset, v8_snapshot_region.size);
 743     } else {
 744       gin::V8Initializer::LoadV8Snapshot();
 745     }
 746     if (v8_natives_fd != -1) {
 747       auto v8_natives_region = g_fds->GetRegion(kV8NativesDataDescriptor);
 748       gin::V8Initializer::LoadV8NativesFromFD(
 749           v8_natives_fd, v8_natives_region.offset, v8_natives_region.size);
 750     } else {
 751       gin::V8Initializer::LoadV8Natives();
 752     }
 753 #else
 754     gin::V8Initializer::LoadV8Snapshot();
 755     gin::V8Initializer::LoadV8Natives();
 756 #endif  // OS_POSIX && !OS_MACOSX
 757 #endif  // V8_USE_EXTERNAL_STARTUP_DATA
 758
 759     if (delegate_)
 760       delegate_->PreSandboxStartup();
 761
 762     if (!process_type.empty())
 763       CommonSubprocessInit(process_type);
 764
 765 #if defined(OS_WIN)
 766     CHECK(InitializeSandbox(params.sandbox_info));
 767 #elif defined(OS_MACOSX) && !defined(OS_IOS)
 768     if (process_type == switches::kRendererProcess ||
 769         process_type == switches::kPpapiPluginProcess ||
 770         (delegate_ && delegate_->DelaySandboxInitialization(process_type))) {
 771       // On OS X the renderer sandbox needs to be initialized later in the
 772       // startup sequence in RendererMainPlatformDelegate::EnableSandbox().
 773     } else {
 774       CHECK(InitializeSandbox());
 775     }
 776 #endif
 777
 778     if (delegate_)
 779       delegate_->SandboxInitialized(process_type);
 780
 781     // Return -1 to indicate no early termination.
 782     return -1;
 783   }
 784
 785   int Run() override {
 786     DCHECK(is_initialized_);
 787     DCHECK(!is_shutdown_);
 788     const base::CommandLine& command_line =
 789         *base::CommandLine::ForCurrentProcess();
 790     std::string process_type =
 791         command_line.GetSwitchValueASCII(switches::kProcessType);
 792
 793     MainFunctionParams main_params(command_line);
 794     main_params.ui_task = ui_task_;
 795 #if defined(OS_WIN)
 796     main_params.sandbox_info = &sandbox_info_;
 797 #elif defined(OS_MACOSX)
 798     main_params.autorelease_pool = autorelease_pool_.get();
 799 #endif
 800
 801 #if !defined(OS_IOS)
 802     return RunNamedProcessTypeMain(process_type, main_params, delegate_);
 803 #else
 804     return 1;
 805 #endif
 806   }
 807
 808   void Shutdown() override {
 809     DCHECK(is_initialized_);
 810     DCHECK(!is_shutdown_);
 811
 812     if (completed_basic_startup_ && delegate_) {
 813       const base::CommandLine& command_line =
 814           *base::CommandLine::ForCurrentProcess();
 815       std::string process_type =
 816           command_line.GetSwitchValueASCII(switches::kProcessType);
 817
 818       delegate_->ProcessExiting(process_type);
 819     }
 820
 821 #if defined(OS_WIN)
 822 #ifdef _CRTDBG_MAP_ALLOC
 823     _CrtDumpMemoryLeaks();
 824 #endif  // _CRTDBG_MAP_ALLOC
 825 #endif  // OS_WIN
 826
 827 #if defined(OS_MACOSX) && !defined(OS_IOS)
 828     autorelease_pool_.reset(NULL);
 829 #endif
 830
 831     exit_manager_.reset(NULL);
 832
 833     delegate_ = NULL;
 834     is_shutdown_ = true;
 835   }
 836
 837  private:
 838   // True if the runner has been initialized.
 839   bool is_initialized_;
 840
 841   // True if the runner has been shut down.
 842   bool is_shutdown_;
 843
 844   // True if basic startup was completed.
 845   bool completed_basic_startup_;
 846
 847   // Used if the embedder doesn't set one.
 848   ContentClient empty_content_client_;
 849
 850   // The delegate will outlive this object.
 851   ContentMainDelegate* delegate_;
 852
 853   scoped_ptr<base::AtExitManager> exit_manager_;
 854 #if defined(OS_WIN)
 855   sandbox::SandboxInterfaceInfo sandbox_info_;
 856 #elif defined(OS_MACOSX)
 857   scoped_ptr<base::mac::ScopedNSAutoreleasePool> autorelease_pool_;
 858 #endif
 859
 860   base::Closure* ui_task_;
 861
 862   DISALLOW_COPY_AND_ASSIGN(ContentMainRunnerImpl);
 863 };
 864
 865 // static
 866 ContentMainRunner* ContentMainRunner::Create() {
 867   return new ContentMainRunnerImpl();
 868 }
 869
 870 }  // namespace content